What is a transmission service for a 2001 Accent AT?
 

I was surprised that the owner manual for my 2001 Accent AT suggests a
ATF change only at 168000km for normal conditions. The dealership
inspected the fluid at 90000km and no service was needed.

Now at 125000km, I am thinking about the transmission service but the
dealer charges $160. ATF capacity for my car is 6.7 liters according
to specs. My parts list for a transmission service will be 5 liters
SP3 oil, filter, drain plug washer and silicone gasket. This is needed
to clean the oil pan, replace filter and ATF.

Is there anything else in a transmission service?